If we consider the interaction between ripplons of different wave vectors in the recoil process,the influency on the ground state energy of the electron-ri-pplon system was discussed.

• 当计及电子在反冲效应中发射和吸收不同波矢的涟波子之间相互作用时，讨论对电子-涟波子系统基态能量的影响。